ASN Wikibase Occurrence # 354714
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| Date: | Saturday 14 March 1998 |
| Time: | 11:10 LT |
| Type: |  Grumman G-164A Ag-Cat |
| Owner/operator: | Private |
| Registration: | N8626H |
| MSN: | 1437 |
| Total airframe hrs: | 7737 hours |
| Engine model: | P&W R-985-AN14B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Marianna, FL -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Approximately ten minutes into the flight the pilot reported that the engine developed a rough running condition. The pilot tried several power settings in an effort to reduce the condition, but no action on his part resolved the rough running condition. Since the pilot could not maintain altitude, the he selected an adjacent field for an emergency landing. The pilot said that landing surface was rough and uneven. Examination of the engine assembly disclosed that the right magneto cover was not secure and that the five screws that secure the cover to the magneto assembly were missing. The visual examination of the internal components of the magneto assembly showed evidence of water stains on the magneto block. Internal component continuity was established when the engine was rotated completely through. Low compression was also noted on all cylinders.
Probable Cause: The failure of maintenance personnel to secure the magneto cover that resulted in water contamination and the subsequent loss of engine power. A factor was rough and uneven terrain.
Accident investigation:
 |
|
Sources:
NTSB ATL98LA055
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Mar-2024 17:32 | ASN Update Bot | Added |
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